Genetics/Biology Multiple Choice

Question 1  
  According to Chargaff's rule, which of the following base-pairings is correct?  
   a. Adenine—guanine.  
   b. Guanine – uracil.  
   c. Thymine – cytosine.  
   d. Adenine –thymine.  


Question 2  
  How do mutations affect an organism?  
   a. They may cause the development of a disease-causing allele.  
   b. They may cause the development of a more beneficial allele.  
   c. They, in some cases, may have no noticeable affect.  
   d. They do everything listed above.  


Question 3  
  Genes provide the information needed to produce _____ in the cell.  
   a. Ribosomes.  
   b. Enzymes.  
   c. Lipids.  
   d. Glucose.  


Question 4  
Which of the following would indicate a base pairing mutation in DNA?  
   a. An A paired with a T.  
   b. A C paired with a G.  
   c. A G paired with a T.  
   d. All listed above are improper base pairs.  


Question 5  
How many enzymes are typically produced from a single gene?  
   a. One.  
   b. Two.  
   c. Three.  
   d. An unlimited number.  


Question 6    
Which of the following can produce sticky ends in DNA sequences?  
   a. Plasmids.  
   b. Transformation.  
   c. Restriction enzymes.  
   d. Bacteria.  


Question 7    
Two different restriction enzymes recognize:  
   a. Two different DNA sequences.  
   b. Two different plasmids.  
   c. Two different types of bacteria.  
   d. Two different human genes.  


Question 8    
You are attempting to insert a human gene into a plasmid. You cut the plasmid with a certain restriction enzyme and you cut the human gene with a different restriction enzyme. You find the sticky ends produced in the plasmid are not complementary to those in the human gene. What happened?  
   a. There must have been a mutation.  
   b. The restriction enzymes must have made a mistake when they cut the DNA.  
   c. The two different restriction enzymes used had different DNA recognition sequences.  
   d. There must have not been a mutation.  


Question 9    
  In a PCR reaction, the strands of DNA are first separated by ___.  
   a. Heating.  
   b. Adding alcohol.  
   c. Treatment with an acid.  
   d. Treatment with a strong base.  


Question 10    
The process by which one learns about the order of bases in a segment of DNA is called ___.  
   a. The polymerase chain reaction.  
   b. Sequencing.  
   c. Cloning.  
   d. Regulation.